Method and device for the compression and decompression of data in a transmission system
First Claim
1. A data compression or decompression method of the type applied to a system of data transmission by exchanging protocol data units between at least one transmitter terminal and at least one receiver terminal, each of said protocol data units comprising a header field and a data field, the compression method comprising the steps of:
- associating with a first sequence of N source protocol data units, a second sequence of M protocol data units to be transmitted, M being smaller than or equal to N;
associating with at least certain data fields of said protocol data units to be transmitted, data that correspond to the compression of data contained in the data fields of at least two of said source protocol data units, the compression being according to at least one compression algorithm;
associating with at least certain of said protocol units to be transmitted, reconstruction data that enables the reconstruction of said first sequence of source protocol data units from said second sequence of protocol data units to be transmitted;
concatenating the compressed data and the reconstruction data to form a sequence of concatenated data; and
slicing said sequence of concatenated data into data blocks, the data field of each of said protocol data units to be transmitted comprising at least one of said data blocks.
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Abstract
A method for the compression of data applied to a system for the transmission of data in protocol data units between at least one emitter terminal and at least one receiver terminal. Each protocol data unit comprises a header field and a data field. A first sequence of N source protocol data units is associated with a second sequence of M protocol data units to be transmitted, M being smaller or equal to N. The data fields of the protocol data units transmitted comprise data that has been compressed (according to at least one compression algorithm). The data fields are then made up of data contained in the data fields that has been compressed, and also data allowing reconstruction of N source protocol data units.
113 Citations
21 Claims
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1. A data compression or decompression method of the type applied to a system of data transmission by exchanging protocol data units between at least one transmitter terminal and at least one receiver terminal, each of said protocol data units comprising a header field and a data field, the compression method comprising the steps of:
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associating with a first sequence of N source protocol data units, a second sequence of M protocol data units to be transmitted, M being smaller than or equal to N; associating with at least certain data fields of said protocol data units to be transmitted, data that correspond to the compression of data contained in the data fields of at least two of said source protocol data units, the compression being according to at least one compression algorithm; associating with at least certain of said protocol units to be transmitted, reconstruction data that enables the reconstruction of said first sequence of source protocol data units from said second sequence of protocol data units to be transmitted; concatenating the compressed data and the reconstruction data to form a sequence of concatenated data; and slicing said sequence of concatenated data into data blocks, the data field of each of said protocol data units to be transmitted comprising at least one of said data blocks. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. Data compression and/or decompression device, of the type applied to a system of data transmission by exchanging protocol data units between at least one transmitter terminal and at least one receiver terminal, each of said protocol data units comprising a header field and a data field, characterized in that it comprises compression means associating, in at least one direction of data transmission and for at least one communication, with a first sequence of N source protocol data units, a second sequence of M protocol data units to be transmitted, M being smaller than or equal to N, said compression means comprising:
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data compression means, according to at least one compression algorithm, providing for the compression of data contained in the data fields of at least two of said source protocol data units; means for generating reconstruction data that enable the reconstruction of said first sequence of source protocol data units from said second sequence of protocol data units to be transmitted; means for concatenating the compressed data and the reconstruction data to form a sequence of concatenated data, and for slicing said sequence of concatenated data into data blocks; and means for transmitting protocol data units to be transmitted comprising at least one of said data blocks. - View Dependent Claims (19, 20, 21)
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Specification